ES Valve
Instruction Manual
December 2008
10
Figure 7. Double Graphite Ribbon/Filament Arrangements
for use in ENVIRO-SEAL
r
Bellows Seal Bonnets
BUSHING
(KEY 13)
SPACER
(KEY 8)
1
GRAPHITE
FILAMENT
PACKING RING
(KEY 7)
GRAPHITE
RIBBON
PACKING RING
(KEY 7)
12B6102-A
18A0909-D
12B4181-A
12.7 mm
(1/2 INCH)
STEM FOR
NPS 2 VALVES
9.5 mm
(3/8 INCH)
STEM
12.7 mm
(1/2 INCH)
STEM FOR
NPS 3 AND 4
VALVES
1
1
1
1
1
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS;
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
A5870-1 / IL
1
Table 4. Recommended Torque for Packing Flange Nuts
(Not for Spring-Loaded Packing)
VALVE
STEM
DIAMETER
PRESS-
URE
RATING
GRAPHITE TYPE
PACKING
PTFE TYPE PACKING
Minimum
Torque
Maximum
Torque
Minimum
Torque
Maximum
Torque
mm Inches
N
S
m Lbf
S
in N
S
m Lbf
S
in N
S
m Lbf
S
in N
S
m Lbf
S
in
9.5
3/8
CL125,
150
3
24
5
48
1
12
3
24
CL250,
300
4
36
7
60
2
18
3
30
CL600
5
48
8
72
3
24
4
36
12.7
1/2
CL125,
150
5
48
8
72
3
24
4
36
CL250,
300
7
60
10
84
3
30
5
42
CL600
10
84
14
120
5
42
7
60
19.1
3/4
CL125,
150
11
96
16
144
5
48
8
72
CL250,
300
14
120
20
180
7
60
10
90
CL600
20
180
30
264
10
90
15
132
25.4
1
CL300
24
216
37
324
12
108
16
144
CL600
34
300
50
444
16
144
24
216
31.8 1-1/4
CL300
33
288
49
432
16
144
24
216
CL600
45
396
66
588
22
192
33
288
WARNING
To avoid personal injury due to leaking
fluid, avoid damaging gasket sealing
surfaces. The surface finish of the
valve stem (key 7) is critical for making
a good packing seal. The inside surface
of the cage or cage/baffle assembly
(key 3), or cage retainer (key 31), is
critical for smooth operation of the
valve plug. The seating surfaces of the
valve plug (key 2) and seat ring (key 9)
are critical for proper shutoff. Unless
inspection reveals otherwise, assume
all these parts are in good condition
and protect them accordingly.
2. Packing parts can be removed if desired.
Replace these parts as described in the Replacing
Packing procedure. Remove the load ring (key 26)
from an NPS 8 ES valve, or the cage adaptor (key 4)
from any restricted trim valve, and wrap it for
protection.
3. Lift the valve plug and stem assembly out of the
valve and set it on a protective surface. If the valve
plug is to be reused, protect the valve plug seating
surface to prevent scratches. On an NPS 6 ES valve
with Whisper Trim III cage or WhisperFlo trim, also
remove the bonnet spacer (key 32) and bonnet
gasket (key 10) on top of the spacer. Then on any
construction with a cage retainer (key 31), remove
the cage retainer and its associated gaskets.
A Whisper Trim III and WhisperFlo trim cage retainer
has two 3/8 inch-16 UNC tappings in which screws
or bolts can be installed for lifting.
4. Remove the cage or cage/baffle assembly
(key 3), the associated gaskets (keys 10, 11,
and 12), and shim (key 51 for the ES valve, key 27
for the EAS valve). If the cage is stuck in the valve
body, use a rubber mallet to strike the exposed
portion of the cage at several points around its
circumference.
5. Remove the seat ring or liner (key 9) or disk seat
(key 22), seat ring gasket (key 13), and the seat ring
adaptor (key 5) and adaptor gasket (key 14) where
used in a restricted trim seat ring construction. PTFE
seat constructions use a disk (key 23) sandwiched
between the disk seat and disk retainer (key 21).
6. Inspect parts for wear or damage which would
prevent proper operation of the valve. Replace or
repair trim parts according to the following procedure
for lapping metal seats or other valve plug
maintenance procedures as appropriate.
